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Triazicide insecticide is part of the Spectracide home and garden line of products for consumers. The active ingredient, gamma-cyhalothrin, is a synthetic pyrethroid that imitates the contact-killing action of pyrethrin insecticides formulated from chrysanthemums. Although toxic to bees, the product is harmless to pets and children once it dries and may be used on lawns, some fruit trees and vegetable crops. It should never be used on berries, including blackberries, according to the company's website. Most types of blackberry (Rubus spp.) grow best in U.S. Department of Agriculture plant hardiness zones 6 through 8.

Berries and Triazicide

On plants that produce edibles, such as fruit trees and vegetable plants, you must wait up to three weeks before harvesting the food. Read the product label carefully for the list of treatable plants and to determine waiting times before harvest. If you've already sprayed blackberry plants with Triazicide, the website recommends waiting at least 21 days before harvesting the fruit. It is best not to spray blackberries with Triazicide, however. Instead, choose an insecticide that specifically states on the label it is safe to use on blackberries.

About the Author

Audrey Lynn has been a journalist and writer since 1974. She edited a weekly home-and-garden tabloid for her hometown newspaper and has regularly contributed to weekly and daily newspapers, as well as "Law and Order" magazine. A Hambidge Fellow, Lynn studied English at Columbus State University.